DNA which regulates gene expression in coryneform bacteria

ABSTRACT

The invention concerns a DNA fragment located in front of the malate synthase gene of a coryne-form bacterium and isolated from the latter. Any structural gene which codes for a protein can be inserted after this DNA fragment. After transformation of such a construct into a coryne-form bacterium, expression of the structural gene inserted after the DNA fragment is regulated. The invention also concerns a process for synthesizing any protein by culturing a transformed coryne-form bacterium. A bacterium of this type contains in replicable form a DNA fragment isolated from the malate synthase gene of a coryne-form bacterium, and after which the structural gene which codes for the protein to be synthesized is inserted. Since expression of the structural gene which codes for the protein to be synthesized is regulated by the DNA located in front of it, the structural gene is expressed and the desired protein synthesized as soon as a suitable inducing agent is added to the medium.

This application is a 371 application of PCT/DE95/01555, filed Nov. 7, 1995.

FIELD OF THE INVENTION

The invention relates to a DNA which regulates gene expression in coryneform bacteria.

BACKGROUND OF THE INVENTION

Each organism is required, in the course of growth to synthesize new cell substances. There are numerous cell components, like, for example, amino acids and porphyrins which are to be newly formed starting from metabolites of the citrate cycle. This means that the metabolites involved in the citrate cycle must be newly synthesized. In the growth of microorganisms on acetate, ethanol or fatty acids, metabolites of the acetate cycle are newly synthesized by a reaction sequence which has been called the glyoxylate cycle (Kornberg, Biochemical Journal 99 (1966) 1-11), key enzymes for the glyoxylate cycle being the enzymes isocitrate lyase and malate synthase. Since the named enzymes in many organisms can grow exclusively on acetate, ethanol or fatty acids, but not on carbohydrates, the activity or the new synthesis of the two enzymes is mainly regulated by the carbon source of the medium.

Because of their club-like configuration, Corynebacterium glutamicum and the closely associated C. melassocolae, B. flavum and B. lactofermentum are counted as coryneform bacteria. These types of bacteria also belong to the known class of "glutamic acid bacteria" since they are capable under certain growth conditions of liberating large amounts of glutamate in the medium. The named microorganisms are of considerable industrial interest since they can be used for the production of amino acids, purines and proteins. For C. glutamicum, C. melassecolae, B. flavum and B. lactofermentum, growth upon acetate or ethanol is already known and it has been found that they are involved in a glyoxylate cycle, i.e. also utilize the enzymes isocitrate lyase and malate synthase (for an overview see Kinoshita, Amino acids, in Biology of Industrial Organisms, 1985, pages 115-142, Benjamin/Cummings Publishing).

In spite of long term industrial use of these organisms only recently have molecular biological methods been developed with the aid of which coryneform bacteria can be genetically modified for certain specific purposes. As a rule, the gene to be cloned is cloned under the control of its own promoters on vectors which are available in higher copy numbers in coryneform bacteria. It has been found in many cases that a strong overexpression of individual genes is a drawback to the growth of coryneform bacteria and thus has an effect on the production of desired products. This has its origin in an overproduction of the corresponding gene products to toxic effects within the metabolism of the cell and gives rise to a reduction in the growth of these cell. An example of such a case is the homologous overexpression of mutated genes which code for deregulated enzymes, i.e. such enzymes whose activity no longer has end product blocking, for instance, the homologous overexpression of the HOM 1 gene which codes for a deregulated homoserine dehydrogenase (Reinscheid et al., Applied the Environmental Microbiology 60 (1994), 126-132). There are however, also known cases in which the overexpression of nonmutated genes is detrimental in a homologous system for the growth of C. glutamicum (for example Eikmanns et al., Microbiology 140 (1994) 1817-1828). In addition, there are significant problems when genes, which do not stem from coryneform bacteria, should be overexpressed in them. In order to express a desired gene in coryneform bacteria, without having to take into consideration a growth blockage by the corresponding gene product, there are various possibilities: a desired gene can be integrated in a single copy number in the chromosome of coryneform bacteria. Since one copy of these genes is provided in the organism, as a rule, no toxic effects arise from the corresponding gene product. A weakness of this process is found in the work-intensive methodology to achieve the desired goal. ln addition, with a single copy number of the inserted gene, seldom is a sufficient quantity of a desired material formed.

An alternative to the integration of a gene in the chromosome of coryneform bacteria is the cloning of a gene on a vector with low copy number in coryneform bacteria. This has the advantage that the corresponding gene product is formed in relatively small amounts and thus usually is not toxic for the cells. However, also in this case a relatively small quantity of the gene product is formed which for biotechnological purposes is a drawback.

It has been desired to form a certain gene product in a large quantity only to a certain point in time in order to overcome the disadvantageous effects of this gene product on the production or growth of the microorganism. To achieve this goal the tendency has been to clone a desired gene without its own promoter behind a controllable promoter. For the controllable Escherichia coli promoters lac, Lambda P_(L) and trp have already been indicated for use in coryneform bacteria to regulate expression of various genes (Tsuchiya and Morinaga, Bio/Technology 6 (1988) 428-431). However, these promoters have various drawbacks; these promoters do not stem from coryneform organisms and thus have foreign DNA. By the incorporation of such a promoter in coryneform bacteria, these become recombinant organisms for which stricter safety rules apply. In addition, the conditions which are necessary for each of the three promoters for induction of a gene are relatively uninteresting for industrial purposes. Thus the lac-promoter, for induction of a gene, requires the relatively expensive substance IPTG which makes the large-scale use of this promoter uneconomical. The promoter Lambda P_(L) is activated by heat. Heat, however, not only damages the organisms but also has a detrimental effect to the product formed so that this promoter has no industrial interest for coryneform bacteria. The trp-promoter is activated by a tryptophan deficiency. As a rule coryneform bacteria does not suffer from tryptophan deficiency so that the use of this promoter is preconditioned on the production of coryneform tryptophan deficient mutants. Since the recovery of such mutants is relatively expensive, even the trp-promoter has not found up to now any involvement in the biotechnological use with coryneform bacteria.

The ideal case for a controllable promoter is a coryneform promoter which can be regulated by an easily available inexpensive substance. The hitherto single coryneform promotor described is that of the gene for isocitrate lyase (EP-OS 0 530 765). This promotor leads to expression of genes as long as no sugar is present in the medium. Since sugar is introduced as a carbon source in most fermentation mediums it is sensible to obtain a controllable promoter which also gives rise to expression of a gene in the presence of sugar with an inexpensive inductor.

OBJECT OF THE INVENTION

It is thus the object of the invention to provide a DNA fragment which enables, independently of the carbon source of the culture medium, a controlled expression of different genes in coryneform bacteria.

SUMMARY OF THE INVENTION

This object is achieved according to the invention with a DNA fragment which precedes the malate synthase gene of a coryneform bacteria and which is isolated therefrom and which can express an optional structure gene coding for a protein after incorporation behind the DNA fragment in a vector and regulates transformation in a coryneform bacteria.

It can be determined that the expression of the malate synthase gene in coryneform bacteria is induced by the presence of inductors as for example lactate, pyruvate, and/or acetate. This induction is especially effected by acetate even when still other carbon sources are present in the medium. Thus even in the presence of sugars or in complex media, a significant induction is effected by acetate.

After isolation of a DNA fragment preceding the malate synthase gene of a coryneform bacteria, the optional structure gene is connected to it which codes for a protein to be synthesized, this construct being ligated into a vector and then transformed in a coryneform bacterium. During the cultivation of such a transformant, at an optional point in time, the inductor, like lactate, pyruvate and preferably acetate, is added to the medium whereupon the structure gene is expressed at the desired point in time and thus the desired protein is synthesized. The DNA fragment prepared according to the invention thus enables the controlled expression of various genes in coryneform bacteria. Since the isolated DNA itself stems from a coryneform bacterium, the above described regulation occurs within a homologous system. The DNA regions according to the invention permit for the first time the possibility of regulated expression of genes in coryneform bacteria in a homologous system using an inexpensive indicator like acetate and independent of the composition of the fermentation media. Advantageously the DNA fragment preceding the malate synthase gene of Corynebacterium glutamicum and isolated from it is prepared;

that is from C. glutamicum the gene for malate synthase (aceB) together with the structures necessary for expression of regulation, is isolated and sequenced. The DNA sequence and the amino acid sequence deduced therefrom is shown in Table 2. In Table 2 the ribosome binding sites of the aceB gene are underscored and indicated with "RBS". The potential terminator of the transcription of aceB is indicated by antiparallel arrows.

It can be seen that the DNA region ahead of the malate synthase gene from nucleotide 1 to nucleotide 574 according to Table 2 gives rise to controlled expression also of other genes.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a restriction map of plasmid pAB-17.

FIG. 2 is a restriction map of plasmid pEKB1b.

FIG. 3 is a restriction map of plasmid pEKB1a.

FIG. 4 is a chromatogram showing the separation by electrophoresis on 12.5% polyacrylamide gel under denaturing conditions of proteins produced by C. glutamicum WT cells containing plasmid pEKB1a.

EXAMPLE 1. Investigation of the Activity of Ralate Synthase in Cell Extracts of Corynebacterium glutamicum After Growth on Various Media.

In extracts of C. glutamicum strain ATCC 13032 (wild type) the activity of malate synthase (MSY) after growth of different media is determined to investigate the influence of the carbon source on the activity of this enzyme. For this purpose the cells are incubated for 14 hours in 10 ml 2xTY complete medium (Sambrook et al., Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press) at 30° C. with shaking (120 RPM) The cells were then sedimented by centrifugation, washed once with a buffer at pH 6.8 (0.1 M potassium phosphate) and taken up in one ml of the same buffer. Each 60 ml of medium is inoculated with the resulting cell suspension to obtain an optical density (OD₆₀₀) of 1.0. The media used were 2xTY complete medium or CgC-minimal medium (Eikmanns et al., Applied Microbiological Biotechnology 34 (1991) 617-622) with each sample containing 1% of a carbon source in the form of glucose, acetate, pyruvate, lactate, citrate, succinate, fumarate or glutamate. The cultures are again inactivated at 30° C. and, when the OD₆₀₀ reached 8 to 10, the cells were harvested by centrifugation, washed once with a buffer at pH 7.6 (50 mM Tris/HCl), taken up in 1 ml of the same buffer, and disintegrated by ultrasonic treatment in a Branson Sonifier W250 (10 minutes, pulsed with an interval of 20% and a power of 30 watts). For separation of the cell detritus, the homogenate was centrifuged for 30 minutes at 13000 RPM in a Sigma 2K15 cooled centrifuge at 4° C. and the clear supernatant (raw extract) used for determination of the MSY activity.

The enzyme test contains in its final volume of 1.0 ml, 50 mM Tris/HCl, (pH 7.6), 40 MM MgCl₂, 2 mM Na-Glyoxylate, 0.15 mM acetyl-coenzyme A and the raw extract. The set of samples is incubated at 30° C. Over a time period of 2 minutes, the extinction decrease at 232 nm is determined, resulting from the splitting of the thioester bond of acetyl-CoA. The extinction coefficient of acetyl-CoA at 232 nm is 4.5 mM⁻¹ cm⁻¹ (Stadtman, Methods in Enzymology, Vol. 3, 1957, New York: Academic Press). The protein content of the raw extract was determined with the aid of the Biuret Method (Bradford, Analytical Biochemistry 72 (1976) 248-254). The specific malate synthase activities are given in Table 1.

As can be seen from Table 1, the activity of MSY upon growth on 2xTY complete medium as well as on CgC minimal medium with glucose, citrate, succinate, fumarate or glutamate as the carbon sources, the MSY activity rises to a value of 0.173 U/mg protein or 0.192 U/mg protein. The highest MSY activity with 2.212 U/mg is observed in growth on CgC minimal medium with acetate. If acetate is added to the above-mentioned media, there is a strong MSY activity increase to values of 0.500 U/mg protein to 1.330 U/mg protein.

These results indicate that in C. glutamicum the activity of the MSY is regulatable by the carbon source in the medium.

2. Isolation and subeloning of the MSY Gene of Corynebacterium glutamicum.

For the isolation of the MSY gene (aceB) from C. glutamicum, based upon the cosmid pH 79 (Hohn and Collins, Gene 11 (1980) 291-298) a corynebacterial cosmid gene bank is achieved by a known method (Sambrook et al., Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press). A C. glutamicum chromosomal DNS is isolated and partially digested with the restriction enzyme Sau3A. After ligation of the obtained fragments in the BamHI interface of the cosmid pHC79, the composition is packed in the protein shell of the bacterial phage Lambda and the E. coli strain ED8654 is transferred therewith (Murray et al Molecular Gene Genetics 150 (1977) 53-61). The packing of the recombinant cosmid in the protein shell of the phage Lambda is effected according to one of the methods of Sambrook et al (Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press) and subjected to a restriction analysis with the enzyme HINdIII. It has been found that 24 of the investigated cosmids have inserts and that the sizes of the inserts were about 35 kb. A total of 2200 cosmid-carrying E. Coli clones were combined and from this mixture by known processes (Sambrook et al (Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press) the cosmid DNA was prepared. For isolating the aceB gene from C. glutamicum, the cosmid gene bank in the MSY defect E. Coli mutant DV21AO5 (Vanderwinkel and De Vlieghere European Journal of Biochemistry 5 (1968) 81-90) was transformed. The mutant DV21AO5 is, because of its MSY defect, no longer able to grow on acetate as the single carbon source. After transformation of the cosmid gene bank in this mutant, a total of about 1000 clones were obtained. From these, on M-9 minimal medium (Sambrook et al Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press) with acetate as a single carbon source, a total of three clones were grown. After isolation of the corresponding cosmids (Sambrook et al Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press), from these clones and renewed transformation in the E. Coli mutant DV21AO5, the resulting clones are only in a position to grow on the M9 medium with acetate as the single carbon source. This permits the surmise that the aceB gene from C. glutamicum is localized on the three cosmids.

To limit the aceB gene from C. glutamicum to a smaller fragment, the three cosmids are partially digested with the restriction enzyme Sau3A and subjected to separation in an electric field on 0.8% agarose gel according to known methods (Sambrook et al Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press). Fragments in the size range of 3.0 kb to 6.0 kb are isolated from the gel by electroelution (Sambrook et al Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press) and ligated in the BamHI cleavage site of the vector pHCYC184 (Chang and Cohen, Journal of Bacteriologicals (1978) 1141-1156). With the ligation composition, E. coli DV21AO5 is transformed and the resulting transformant is investigated anew as to its ability to grow on acetate as a single carbon source. In this manner, nine clones are isolated whose plasmids enable the mutant DV21AO5 to grow on acetate. From the respective recombinant strains, the corresponding plasmids are isolated and subjected to restriction mapping. The restriction map of one of the plasmids pAB-17 is illustrated in FIG. 1. From this plasmid by known procedures, the DNS fragment coding for the MSY is isolated by BfrI-PvuI restriction as a 3 kb fragment and ligated in the C. glutamicum/E. coli swing vector PEKO (Eikmanns et al, Gene 102 (1991) 93-98). In dependence upon the orientation of the insert in the vector, the newly constructed plasmid is designated as peKB1a or pEKB1b. The restriction maps of both plasmids are presented in FIG. 2, and FIG. 3.

3. Analysis of the Nucleotide Sequence of the MSY Structure Gene and Bordering Regions.

For the sequencing, two overlapping partial fragments on 1.6 kb BfrI-KpnI and a 1.8 kb SphI-PvuI fragments are isolated from the plasmid paB-17 with known methods. The overhanging ends of both fragments are filled to smooth ends with Klenow-polymerase (Sambrook et al Molecular Cloning, A Laboratory Handbook, 1989, Cold Spring Harbor Laboratory Press) and ligated at suitable cut locations of the plasmid pUC18 (Vieira and Messing, Gene 19 (1982) 259-268). The so generated plasmid is used according to the method of Henikoff (Gene 28 (1984) 351-359) to produce deletion constructs which are then sequenced by the chain breakage sequencing method (Sanger et al., Procedures of the National Academy of Science 74 (1977) 5463-5467). The thus-obtained total sequence of the 3 kb BfrI-PvuI fragment is shown in Table 2. Apart from this, Table 2 shows the protein sequence which is derived from the aceB gene for an MSY from C. glutamicum, which ahead of the gene has ribosome binding sites and behind the gene has a termination structure for the transcription.

4. NOY Activity of C. glutaxicum Strains which Carry the MSY Gene on Plasaids.

By electroporation (Liebl et al, FEMS Microbiological Letters 65 (1989) 299-304), the plasmids pEKB1a and pEKB1b are inserted in C. glutamicum and the resulting strains are designated WT(pEKB1a) and WT(pEKB1b). By known methods the newly constructed C. glutamicum strains are cultured on CgC minimal medium with glucose, glucose/acetate or acetate as carbon sources up to OD₆₀₀ of 8 to 10, raw extracts are produced and the specific NSY activities are illustrated in Table 3.

The C. glutamicum strains WT(pEKB1a) and WT(pEKB1b) show significantly higher activities on all three carbon sources respectively than the C. glutamicum wild type WT(pEKO) which contains the starting vector pEKO. These results show a functional dependency of the activity upon the 3 kb BfrI-PvuI fragment from an aceB gene of C. glutamicum. After growth of the C. glutamicum strains WT(pEKB1a) and WT(pEKB1b) on CgC-glucose/acetate, their MSY activities are about eight times higher than with growth of these strains on glucose. With growth of both strains on CgC minimal medium with acetate as a single carbon source, the MSY activity is 16 to 18 times higher than with growth upon CgC glucose. These results underscore that the isolated fragment contains all of the structures of the aceB gene necessary for expression and regulation, i.e. the promoter and regulatory sequence. These structures lie ahead of the aceB gene.

Since the cloned fragment ahead of the characteristic aceB structure gene has 584 bp (Table 2) the structures for expression and regulation must be localized in this DNS region.

5. Investigation of the Regulation and Expression of the aceB Gene of C. glutamicum.

In order to ascertain that the observed regulation of MSY is a regulation on the genetic level and not a regulation of the enzyme itself (e.g. by inhibition, activation or covalent modification) raw extracts of the C. glutamicum WT (pEKB1a) cells grown on CgC minimal medium with glucose and C. glutamicum WT (pEKB1a) cells grown on CgC minimal medium with acetate are investigated with respect to their protein patterns. For this purpose, the mentioned strains are grown by known methods on the corresponding media, raw extracts are produced and these are separated by the method of Laemmli (Nature 227 (1970) 680-685) under denaturing conditions and are separated on 12.5% polyacrylamide gel (FIG. 4) for localization of the MSY-protein bands in the raw extract, the MSY from C. glutamicum is purified to homogeneity (see Appendix 1) and parallel to the raw extracts, are subjected to an electrophoresis under denaturing conditions (FIG. 4). After growth of C. glutamicum WT on CgC acetate, one notes at the level of the MSY, a clearly more intensive protein band than after growth of this strain on CgC acetate of very intensive MSY protein band. From the intensity of these bands one can conclude that the MSY in these strains makes up about 20% of the total cell protein. The results indicate that the structures necessary for the expression and regulation of aceB, under induced conditions give rise to a new synthesis of larger quantities of proteins. In addition, the results are clear that the observed increase in the MSY activity after growth on acetate is associated with the new synthesis of the MSY protein.

6. Test of the DNS Region Lying Ahead of the aceB Gene with Respect to Functionality in an Independent System.

The DNS region ahead of the aceB gene was isolated by known methods as the 574 bp BfrI-DraI fragment, the overhanging ends are filled with clean-out polymerization to smooth ends and ligated into the SalI cuts of the vector pEK-plCm (Eikmanns et al, Gene 102 (1991) 93-98). This plasmid carries behind the insertion side the chloramphenicol-acetyltransferase gene (cat) but without a respective promoter, i.e. the cat gene in C. glutamicum cannot be read from plasmid pEKp1Cm. After the ligation of the BfrI-DraI fragment in the vector pEKp1Cm it was determined by sequencing by known methods that the orientation of the BfrI-DraI fragment ahead of the cat gene corresponded to that ahead of the aceB gene. The corresponding plasmid was designated aspIWI. After introducing the plasmid pIWI in C. glutamicum by known methods, the activity of chloramphenicol-acetyltransferase (CAT) was determined in this strain after growth on CgC glucose, CgC glucose/acetate or CgC acetate. The strains to be invigorated were cultivated by known methods to an OD₆₀₀ of 8 to 10, raw extracts were produced and in these specific CAT activity was determined by the method of Shaw (Method of Enzymology 43 (1975) 737-755). The test contained in a final volume of 1.0 ml 100 mM Tris/HCl pH 7.8, 1 mM acetyl-coenzymeA, 1 mM of 5.5 dithiobis-(2-nitrobenzoic acid) and raw extract and was saturated with 2.5 mM chloramphenicol. The composition was incubated at 30° C. Over a period of 2 minutes the extinction increase at 412 nm was determined. The protein content of the raw extract was determined with the aid of the Biuret method (Bradford, Analogical Biochemistry 72 (1976) 248-254). The obtained CAT activities are given in Table 4. While CAT activity was found in the C. glutamicum WT under any of the test conditions, the recombinant strain C. glutamicum WT(pIWI) showed CAT activity with all carbon sources. However, the CAT activity after growth on CgC cellulose show about 20 times less than after growth on CgC glucose/acetate and 50 times smaller than after growth on CgC acetate. These results indicated that the isolated 574 bp BfrI-Dral fragment of the regulated gene expression promoted the presence of foreign genes. An induction of the foreign genes occurs with acetate, just as in the presence of sugar.

Appendix I

Purification of MSY from C. glutamicum.

For purification of MSY from C. glutamicum, 60 ml of a culture grown in CgC acetate medium to OD₆₀₀ 8 to 10 was used. The cells were washed twice with 20 ml 50 mM of morpholinoethansulfonic acid (MES)/NaOH pH 6.0 and resuspended in 1 ml of the same buffer after addition of 5U/ml Dnase, 15 μg/mg Rnase and 100 μm phenylmethylsulfonyl-fluoride, breakdown and removal of cell detritus is effected in accordance with already known methods. All purification steps are carried out at 40° C. The sole extract is diluted with 50 mM MES/NaOH pH 6 to 10 ml. After 2 hours of ultracentrifugation at 183,000×g the supernatant is chromatified on a FPLC apparatus with HR5/5 monoQ anion exchange column (Pharmacia LKB, Freiburg, Germany). During the first chromatographic purification the MSY is eluted 0.1 M to 0.4 M NaCl gradient in 50 mM MES/NaOH pH 6. For the second chromatography, the buffer is changed for the partially purified MSY by ultrafiltration from 50 mM MES/NaOH pH 6 to 50 mM Tris/HCl pH 8. During the second chromatographic purification the MSY is eluted with an 0.2 M to 0.5 M gradient in 50 mM Tris/HCl pH 8. During both chromatographic separations, a flow rate of 1 ml/min is maintained. The flushing of both separations is concluded in 1 ml/fractions and tested for MSY activity. The fractions containing the activity were combined.

                  TABLE 1                                                          ______________________________________                                         Activity of malate-synthase (MSY) in raw extracts of                           Corynebacterium glutamicum after growth on various carbon sources.                                   Specific MSY-Activity                                    Medium                (U/mg Protein)                                           ______________________________________                                         2xtY-complete medium  0.030                                                    2xTY-complete medium + 1% Acetate                                                                    0.840                                                    CgC-minimum medium (MM) + 1% Glucose                                                                 0.040                                                    CgC-MM + 1% Acetate   2.212                                                    CgC-MM + 1% Pyruvate  0.192                                                    CgC-MM + 1% Lactate   0.173                                                    CgC-MM + 1% Citrate   0.038                                                    CgC-MM + 1% Succinate 0.045                                                    CgC-MM + 1% Fumarate  0.034                                                    CgC-MM + 1% Glutamate 0.041                                                    CgC-MM + 1% Acetate + 1% Glucose                                                                     0.970                                                    CgC-MM + 1% Acetate + 1% Pyruvate                                                                    0.730                                                    CgC-MM + 1% Acetate + 1% Lactate                                                                     0.860                                                    CgC-MM + 1% Acetate + 1% Citrate                                                                     0.500                                                    CgC-MM + 1% Acetate + 1% Succinate                                                                   0.920                                                    CgC-MM + 1% Acetate + 1% Fumarate                                                                    0.910                                                    CgC-MM + 1% Acetate + 1% Glutamate                                                                   1.330                                                    ______________________________________                                    

                                      TABLE 2                                      __________________________________________________________________________                 .         .         .         .         .         .         .                 .         .                                                         1  CTTAAGTGCTGATTCGCAATGGGCGGTGCCGACCACAAAGTATGAGCTAATGCACTGTCACTGTTTCGACG        TGATGTGCATCGGTTTGCG                                                                     .         .         .         .         .         .         .                 .         .                                                         91 TGGTGGCGTGGTTCACACATTGCTCCATCGGGCATTGGTGCGTCAATCGGTTTGGGTTTTTAAGTTTTGTG        CGGGGGTGGTCACCCCTGT                                                                     .         .         .         .         .         .         .                 .         .                                                         181                                                                               TGTGAAGTTTGCAAAGTTCTGGCTTCGCAGAAAAAGTGGGCGGGGGAGTTGCTAGTACGGATGTACTGGGC        AAATGCTCTGAAATGGGAA                                                                     .         .         .         .         .         .         .                 .         .                                                         271                                                                               AATGCAGGCACCGCAACGTTCCGTAGGTTTCGAAGGTGTGACCTAGATAAAAGTCGGGGTTAGGCGGGGGT        AATGACTTAGTAAAGTTCG                                                                     .         .         .         .         .         .         .                 .         .                                                         361                                                                               CAAACCCCTTTTGCTGGTGACGGTGATCACTTAGTCTGATCACATCGCCAAACACGATAAGGGTTGAAATC        GAAAGAAGAGTGGCACCTA                                                                     .         .         .         .         .         .         .                 .         .                                                         451                                                                               GATTCCAGAGGTAGTCAGAGTGCTTTTCTTAAAAGAGTTTTCACAACCGTTAACGCGTAGCCAAACAAGAA        GGATTCGCATTCTTCTGGT                                                                     .         .         .         .         .         .         .                 .         .                                                         541                                                                               TTAGGCACAGGTCATCTAAAACCCATGCTTTAAAAGGAGCCTTCAATGACTGAACAGGAACTGTTGTCTGC        TCAGACTGCCGACAACGCT                                                                                             RBS          M  T  E  Q  E  L  L  S           A  Q  T  A  D  N  A                                                                     .         .         .         .         .         .         .                 .         .                                                         631                                                                               GGAACTGACAGCACCGAACGCGTTGACGCGGGCGGAATGCAGGTTGCAAAAGTTCTCTACGACTTTGTAAC        CGAAGCGGTACTCCCTCGC                                                             G  T  D  S  T  E  R  V  D  A  G  G  M  Q  V  A  K  V  L  Y  D  F  V           T  E  A  V  L  P  R                                                                     .         .         .         .         .         .         .                 .         .                                                         721                                                                               GTGGGTGTGGATGCGGAAAAGTTCTGGTCCGGATTCGCCGCCATCGCCCGGGACCTCACCCCACGCAACCG        CGAGCTGCTTGCTCGCCGC                                                             V  G  V  D  A  E  K  F  W  S  G  F  A  A  I  A  R  D  L  T  P  R  N           R  E  L  L  A  R  R                                                                     .         .         .         .         .         .         .                 .         .                                                         811                                                                               GATGAACTGCAGATGCTTATCGACGACTACCACCGCAACAACTCCGGCACCATCGACCAAGAGGCGTACGA        GGATTTCCTCAAAGAAATC                                                             D  E  L  Q  M  L  I  D  D  Y  H  R  N  N  S  G  T  I  D  Q  E  Q  Y           E  D  F  L  K  E  I                                                                     .         .         .         .         .         .         .                 .         .                                                         901                                                                               GGATACTTGGTTGAGGAGCCAGAAGCTGCAGAAATCCGTACCCAAAACGTCGATACGGAAATCTCCAGCAC        CGCAGGACCTCAGCTGGTT                                                             G  Y  L  V  E  E  P  E  A  A  E  I  R  T  Q  N  V  D  T  E  I  S  S           T  A  G  P  Q  L  V                                                                     .         .         .         .         .         .         .                 .         .                                                         991                                                                               GTTCCAATTCTGAACGCACGCTTCGCGCTGAACGCTGCCAATGCTCGCTGGGGTTCCCTCTACGATGCGTT        GTACGGCACCAACGCCATC                                                             V  P  I  L  N  A  R  F  A  L  N  A  A  N  A  R  W  G  S  L  Y  D  A           L  Y  G  T  N  A  I                                                                     .         .         .         .         .         .         .                 .         .                                                         1081                                                                              CCAGAAACTGATGGCGCTGAAAAGGGCAAGGAGTACAACCCGGTCCGCGGCCAGAAGGTCATCGAGTGGGG        TCGTGAATTCCTCGACAGC                                                             P  E  T  D  G  A  E  K  G  K  E  Y  N  P  V  R  G  Q  K  V  I  E  W           G  R  E  F  L  D  S                                                                     .         .         .         .         .         .         .                 .         .                                                         1171                                                                              GTTGTCCCACTGGACGGTGCTTCGCATGCCGATGTTGAGAAGTACAACATCACCGATGGAAAGCTTGCAGC        CCACATTGGAGATAGCGTC                                                             V  V  P  L  D  G  A  S  H  A  D  V  E  K  Y  N  I  T  D  G  K  L  A           A  H  I  G  D  S  V                                                                     .         .         .         .         .         .         .                 .         .                                                         1261                                                                              TACCGACTGAAAAACCGTGAATCCTACCGTGGCTTCACCGGCAACTTCCTTGATCCAGAAGCAATCCTGCT        GGAAACCAACGGCCTGCAC                                                             Y  R  L  K  N  R  E  S  Y  R  G  F  T  G  N  F  L  D  P  E  A  I  L           L  E  T  N  G  L  H                                                                     .         .         .         .         .         .         .                 .         .                                                         1351                                                                              ATCGAGCTGCAGATCGATCCTGTCCACCCAATCGGCAAGGCAGACAAGACTGGTCTCAAAGACATCGTTTT        GGAATCTGCGATCACCACG                                                             I  E  L  Q  I  D  P  V  H  P  I  G  K  A  D  K  T  G  L  K  D  I  V           L  E  S  A  I  T  T                                                                     .         .         .         .         .         .         .                 .         .                                                         1441                                                                              ATCATGGACTTCGAAGACTCCGTTGCAGCTGTTGATGCTGAAGACAAGACCTTAGGTTACTCTAACTGGTT        CGGACTCAACACCGGCGAA                                                             I  M  D  F  E  D  S  V  A  A  V  D  A  E  D  K  T  L  G  Y  S  N  W           F  G  L  N  T  G  E                                                                     .         .         .         .         .         .         .                 .         .                                                         1531                                                                              CTGAAAGAAGAGATGTCCAAGAACGGACGCATCTTCACCCGTGAGCTCAACAAGGACCGCGTCTACATTGG        CCGCAATGGTACCGAGCTG                                                             L  K  E  E  M  S  K  N  G  R  I  F  T  R  E  L  N  K  D  R  V  Y  I           G  R  N  G  T  E  L                                                                     .         .         .         .         .         .         .                 .         .                                                         1621                                                                              GTTCTGCACGGTCGTTCCCTGCTGTTCGTCCGCAACGTTGGTCACCTCATGCAAAACCCATCCATCTTGAT        TGATGGCGAGGAGATCTTC                                                             V  L  H  G  R  S  L  L  F  V  R  N  V  G  H  L  M  Q  N  P  S  I  L           I  D  G  E  E  I  F                                                                     .         .         .         .         .         .         .                 .         .                                                         1711                                                                              GAAGGCATCATGGATGCTGTCTTGACCACTGTTTGTGCCATCCCAGGAATTGCTCCGCAGAACAAGATGCG        CAATTCCCGCAAGGGCTCC                                                             E  G  I  M  D  A  V  L  T  T  V  C  A  I  P  G  I  A  P  Q  N  K  M           R  N  S  R  K  G  S                                                                     .         .         .         .         .         .         .                 .         .                                                         1801                                                                              ATCTACATCGTGAAGCCTAAGCAGCACGGCCCTGAAGAAGTCGCGTTCACCAACGAGCTCTTCGGCCGCGT        TGAGGATCTGCTTGATCTG                                                             I  Y  I  V  K  P  K  Q  H  G  P  E  E  V  A  F  T  N  E  L  F  G  R           V  E  D  L  L  D  L                                                                     .         .         .         .         .         .         .                 .         .                                                         1891                                                                              CCACGCCACACCTTGAAGGTTGGTGTTATGGATGAGGAGCGTCGCACGTCCGTGAACCTGGATGCCAGCAT        CATGGAAGTTGCTGACCGC                                                             P  R  H  T  L  K  V  G  V  M  D  E  E  R  R  T  S  V  N  L  D  A  S           I  M  E  V  A  D  R                                                                     .         .         .         .         .         .         .                 .         .                                                         1981                                                                              TTGGCATTCATCAACACTGGCTTCCTGGACCGCACCGGCGATGAAATCCACACCTCCATGGAAGCAGGCGC        CATGGTGCGCAAGGCTGAT                                                             L  A  F  I  N  T  G  F  L  D  R  T  G  D  E  I  H  T  S  M  E  A  G           A  M  V  R  K  A  D                                                                     .         .         .         .         .         .         .                 .         .                                                         2071                                                                              ATGCAGACCGCACCGTGGAAGCAGGCCTACGAGAACAACAACGTTGATGCAGGTATTCAGCGTGGTCTTCC        TGGCAAGGCTCAGATCGGT                                                             M  Q  T  A  P  W  K  Q  A  Y  E  N  N  N  V  D  A  G  I  Q  R  G  L           P  G  K  A  Q  I  G                                                                     .         .         .         .         .         .         .                 .         .                                                         2161                                                                              AAGGGCATGTGGGCGATGACTGAACTCATGGCAGAAATGCTGGAGAAGAAGATCGGCCAGCCACGCGAAGG        CGCCAACACTGCATGGGTT                                                             K  G  M  W  A  M  T  E  L  M  A  E  M  L  E  K  K  I  G  Q  P  R  E           G  A  N  T  A  W  V                                                                     .         .         .         .         .         .         .                 .         .                                                         2251                                                                              CCTTCACCAACTGGTGCGACGCTGCACGCAACGCACTACCACTTGGTTGATGTGTTCAAGGTTCAAGACGA        ACTGCGTGCTGCCGGCCGC                                                             P  S  P  T  G  A  T  L  H  A  T  H  Y  H  L  V  D  V  F  K  V  Q  D           E  L  R  A  A  G  R                                                                     .         .         .         .         .         .         .                 .         .                                                         2341                                                                              CGCGACAGCCTGCGCAACATTCTCACCATTCCAACCGCACCAAACACCAATTGGTCTGAGGAAGAGAAGAA        GGAAGAGATGGACAACAAC                                                             R  D  S  L  R  N  I  L  T  I  P  T  A  P  N  T  N  W  S  E  E  E  K           K  E  E  M  D  N  N                                                                     .         .         .         .         .         .         .                 .         .                                                         2431                                                                              TGCCAGTCCATCCTCGGATACGTTGTGCGCTGGGTTGAGCACGGTGTTGGTTGCTCCAAGGTTCCAGACAT        CCATGACATCGACCTCATG                                                             C  Q  S  I  L  G  Y  V  V  R  W  V  E  H  G  V  G  C  S  K  V  P  D           I  H  D  I  D  L  M                                                                     .         .         .         .         .         .         .                 .         .                                                         2521                                                                              GAAGACCGCGCAACGCTGCGTATTTCCTCGCAGATGCTGGCCAACTGGATCCGCCATGATGTTGTCTCGAA        GGAGCAGGTCTTGGAGTCA                                                             E  D  R  A  T  L  R  I  S  S  Q  M  L  A  N  W  I  R  H  D  V  V  S           K  E  Q  V  L  E  S                                                                     .         .         .         .         .         .         .                 .         .                                                         2611                                                                              CTGGAACGAATGGCAGTGGTCGTCGACAAGCAAAATGCGGGCGACGAGGCCTACCGCGATATGGCGCCGAA        CTACGACGCCTCCCTCGCC                                                             L  E  R  M  A  V  V  V  D  K  Q  N  A  G  D  E  A  Y  R  D  M  A  P           N  Y  D  A  S  L  A                                                                     .         .         .         .         .         .         .                 .         .                                                         2701                                                                              TTCCAGGCGGCTAAGGACTTGATTTTCGAAGGCACCAAGTCCCCATCGGGCTACACCGAGCCCATCTTGCA        CGCACGCCGCCGCGAGTTC                                                             F  Q  A  A  K  D  L  I  F  E  G  T  K  S  P  S  G  Y T  E  P  I  L  H          A  R  R  R  E  F                                                                       .         .         .         .         .         .         .                 .         .                                                         2791                                                                              AAAGCAAAAAACTAAGCACGCTTTTCGACGCTTACCTGCATCCCAACGGTGACTGACTGCCCCGGAGCCAC        CCTCACTCCTTTTTGGTCA                                                             K  A  K  N                                                                             .         .         .         .         .         .         .                 .         .                                                         2881                                                                              GCACCCAAAAGCGCCGGTTCAACACACACAAAGTCGCGCCATTCACCTTCGCCAATATCGGCCACGGTGGA        GGCGCGACTTTCGCCTGGA                                                         ---------------------→       ←                                                 .         .         .         .         .         .         .                 .         .                                                         2971                                                                              TTCCACACCACAGTGGAATCATGACCATCGCCCTCAATGGTGATGATGCGATCG                      __________________________________________________________________________

                  TABLE 3                                                          ______________________________________                                         Specific Activity of Malate Synthase (MSY) in Raw                              Extracts of the C. glutamicum Wild Types and the Recombinant C.                glutamicum with the Plasmids pEKO, pEKB1a and pEKB1b after Growth              on CgC-Minimum Medium with Glucose, Glucose/Acetate or Acetate as              Carbon Sources.                                                                C. glutamicum-                                                                          Specific   MSY-Activity  (U/mg Protein)                               Strain   CgC-Glucose                                                                               CgC-Glucose/Acetate                                                                          CgC-Acetate                                  ______________________________________                                         WT       0.040      0.970         2.11                                         WT(pEKO) 0.038      0.954         2.23                                         WT(pEKB1a)                                                                              0.350      3.120         6.22                                         WT(pEKB1b)                                                                              0.374      3.240         6.08                                         ______________________________________                                    

                  TABLE 4                                                          ______________________________________                                         Specific Activity of Chloramphenicol-Acetyltransferase                         (CAT) in Raw Extracts of C. glutamicum Wild Types (WT) and the                 Recombinant C. glutamicum strains (WT) (pIWI) after growth on CgC-             Minimum Medium with Glucose, Glucose/Acetate or Acetate as Carbon              Sources.                                                                       C. glu-                                                                               Specific   CAT-Activity CgC-                                                                           (U/mg Protein)Strain                            tamicum-                                                                              CgC-Glucose                                                                               Glucose/Acetate                                                                             CgC-Acetate                                     ______________________________________                                         WT     0.001      0.001        0.001                                           WT(pIWI)                                                                              0.026      0.620        1.320                                           ______________________________________                                    

    __________________________________________________________________________     #             SEQUENCE LISTING                                                 - (1) GENERAL INFORMATION:                                                     -    (iii) NUMBER OF SEQUENCES: 3                                              - (2) INFORMATION FOR SEQ ID NO:1:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 3024 base                                                          (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -    (iii) HYPOTHETICAL: NO                                                    -     (iv) ANTI-SENSE: NO                                                      -     (vi) ORIGINAL SOURCE:                                                              (A) ORGANISM: Corynebacter - #ium glutamicum                                   (B) STRAIN: ATCC 13032                                               -     (ix) FEATURE:                                                                      (A) NAME/KEY: CDS                                                              (B) LOCATION: 586..2805                                              -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:1:                                  - CTTAAGTGCT GATTCGCAAT GGGCGGTGCC GACCACAAAG TATGAGCTAA TG - #CACTGTCA          60                                                                           - CTGTTTCGAC GTGATGTGCA TCGGTTTGCG TGGTGGCGTG GTTCACACAT TG - #CTCCATCG         120                                                                           - GGCATTGGTG CGTCAATCGG TTTGGGTTTT TAAGTTTTGT GCGGGGGTGG TC - #ACCCCTGT         180                                                                           - TGTGAAGTTT GCAAAGTTCT GGCTTCGCAG AAAAAGTGGG CGGGGGAGTT GC - #TAGTACGG         240                                                                           - ATGTACTGGG CAAATGCTCT GAAATGGGAA AATGCAGGCA CCGCAACGTT CC - #GTAGGTTT         300                                                                           - CGAAGGTGTG ACCTAGATAA AAGTCGGGGT TAGGCGGGGG TAATGACTTA GT - #AAAGTTCG         360                                                                           - CAAACCCCTT TTGCTGGTGA CGGTGATCAC TTAGTCTGAT CACATCGCCA AA - #CACGATAA         420                                                                           - GGGTTGAAAT CGAAAGAAGA GTGGCACCTA GATTCCAGAG GTAGTCAGAG TG - #CTTTTCTT         480                                                                           - AAAAGAGTTT TCACAACCGT TAACGCGTAG CCAAACAAGA AGGATTCGCA TT - #CTTCTGGT         540                                                                           #ACT GAA        594TAAA ACCCATGCTT TAAAAGGAGC CTTCA ATG                        #              Met Thr G - #lu                                                 #                1                                                             - CAG GAA CTG TTG TCT GCT CAG ACT GCC GAC AA - #C GCT GGA ACT GAC AGC           642                                                                           Gln Glu Leu Leu Ser Ala Gln Thr Ala Asp As - #n Ala Gly Thr Asp Ser            #      15                                                                      - ACC GAA CGC GTT GAC GCG GGC GGA ATG CAG GT - #T GCA AAA GTT CTC TAC           690                                                                           Thr Glu Arg Val Asp Ala Gly Gly Met Gln Va - #l Ala Lys Val Leu Tyr            # 35                                                                           - GAC TTT GTA ACC GAA GCG GTA CTC CCT CGC GT - #G GGT GTG GAT GCG GAA           738                                                                           Asp Phe Val Thr Glu Ala Val Leu Pro Arg Va - #l Gly Val Asp Ala Glu            #                 50                                                           - AAG TTC TGG TCC GGA TTC GCC GCC ATC GCC CG - #G GAC CTC ACC CCA CGC           786                                                                           Lys Phe Trp Ser Gly Phe Ala Ala Ile Ala Ar - #g Asp Leu Thr Pro Arg            #             65                                                               - AAC CGC GAG CTG CTT GCT CGC CGC GAT GAA CT - #G CAG ATG CTT ATC GAC           834                                                                           Asn Arg Glu Leu Leu Ala Arg Arg Asp Glu Le - #u Gln Met Leu Ile Asp            #         80                                                                   - GAC TAC CAC CGC AAC AAC TCC GGC ACC ATC GA - #C CAA GAG GCG TAC GAG           882                                                                           Asp Tyr His Arg Asn Asn Ser Gly Thr Ile As - #p Gln Glu Ala Tyr Glu            #     95                                                                       - GAT TTC CTC AAA GAA ATC GGA TAC TTG GTT GA - #G GAG CCA GAA GCT GCA           930                                                                           Asp Phe Leu Lys Glu Ile Gly Tyr Leu Val Gl - #u Glu Pro Glu Ala Ala            100                 1 - #05                 1 - #10                 1 -        #15                                                                            - GAA ATC CGT ACC CAA AAC GTC GAT ACG GAA AT - #C TCC AGC ACC GCA GGA           978                                                                           Glu Ile Arg Thr Gln Asn Val Asp Thr Glu Il - #e Ser Ser Thr Ala Gly            #               130                                                            - CCT CAG CTG GTT GTT CCA ATT CTG AAC GCA CG - #C TTC GCG CTG AAC GCT          1026                                                                           Pro Gln Leu Val Val Pro Ile Leu Asn Ala Ar - #g Phe Ala Leu Asn Ala            #           145                                                                - GCC AAT GCT CGC TGG GGT TCC CTC TAC GAT GC - #G TTG TAC GGC ACC AAC          1074                                                                           Ala Asn Ala Arg Trp Gly Ser Leu Tyr Asp Al - #a Leu Tyr Gly Thr Asn            #       160                                                                    - GCC ATC CCA GAA ACT GAT GGC GCT GAA AAG GG - #C AAG GAG TAC AAC CCG          1122                                                                           Ala Ile Pro Glu Thr Asp Gly Ala Glu Lys Gl - #y Lys Glu Tyr Asn Pro            #   175                                                                        - GTC CGC GGC CAG AAG GTC ATC GAG TGG GGT CG - #T GAA TTC CTC GAC AGC          1170                                                                           Val Arg Gly Gln Lys Val Ile Glu Trp Gly Ar - #g Glu Phe Leu Asp Ser            180                 1 - #85                 1 - #90                 1 -        #95                                                                            - GTT GTC CCA CTG GAC GGT GCT TCG CAT GCC GA - #T GTT GAG AAG TAC AAC          1218                                                                           Val Val Pro Leu Asp Gly Ala Ser His Ala As - #p Val Glu Lys Tyr Asn            #               210                                                            - ATC ACC GAT GGA AAG CTT GCA GCC CAC ATT GG - #A GAT AGC GTC TAC CGA          1266                                                                           Ile Thr Asp Gly Lys Leu Ala Ala His Ile Gl - #y Asp Ser Val Tyr Arg            #           225                                                                - CTG AAA AAC CGT GAA TCC TAC CGT GGC TTC AC - #C GGC AAC TTC CTT GAT          1314                                                                           Leu Lys Asn Arg Glu Ser Tyr Arg Gly Phe Th - #r Gly Asn Phe Leu Asp            #       240                                                                    - CCA GAA GCA ATC CTG CTG GAA ACC AAC GGC CT - #G CAC ATC GAG CTG CAG          1362                                                                           Pro Glu Ala Ile Leu Leu Glu Thr Asn Gly Le - #u His Ile Glu Leu Gln            #   255                                                                        - ATC GAT CCT GTC CAC CCA ATC GGC AAG GCA GA - #C AAG ACT GGT CTC AAA          1410                                                                           Ile Asp Pro Val His Pro Ile Gly Lys Ala As - #p Lys Thr Gly Leu Lys            260                 2 - #65                 2 - #70                 2 -        #75                                                                            - GAC ATC GTT TTG GAA TCT GCG ATC ACC ACG AT - #C ATG GAC TTC GAA GAC          1458                                                                           Asp Ile Val Leu Glu Ser Ala Ile Thr Thr Il - #e Met Asp Phe Glu Asp            #               290                                                            - TCC GTT GCA GCT GTT GAT GCT GAA GAC AAG AC - #C TTA GGT TAC TCT AAC          1506                                                                           Ser Val Ala Ala Val Asp Ala Glu Asp Lys Th - #r Leu Gly Tyr Ser Asn            #           305                                                                - TGG TTC GGA CTC AAC ACC GGC GAA CTG AAA GA - #A GAG ATG TCC AAG AAC          1554                                                                           Trp Phe Gly Leu Asn Thr Gly Glu Leu Lys Gl - #u Glu Met Ser Lys Asn            #       320                                                                    - GGA CGC ATC TTC ACC CGT GAG CTC AAC AAG GA - #C CGC GTC TAC ATT GGC          1602                                                                           Gly Arg Ile Phe Thr Arg Glu Leu Asn Lys As - #p Arg Val Tyr Ile Gly            #   335                                                                        - CGC AAT GGT ACC GAG CTG GTT CTG CAC GGT CG - #T TCC CTG CTG TTC GTC          1650                                                                           Arg Asn Gly Thr Glu Leu Val Leu His Gly Ar - #g Ser Leu Leu Phe Val            340                 3 - #45                 3 - #50                 3 -        #55                                                                            - CGC AAC GTT GGT CAC CTC ATG CAA AAC CCA TC - #C ATC TTG ATT GAT GGC          1698                                                                           Arg Asn Val Gly His Leu Met Gln Asn Pro Se - #r Ile Leu Ile Asp Gly            #               370                                                            - GAG GAG ATC TTC GAA GGC ATC ATG GAT GCT GT - #C TTG ACC ACT GTT TGT          1746                                                                           Glu Glu Ile Phe Glu Gly Ile Met Asp Ala Va - #l Leu Thr Thr Val Cys            #           385                                                                - GCC ATC CCA GGA ATT GCT CCG CAG AAC AAG AT - #G CGC AAT TCC CGC AAG          1794                                                                           Ala Ile Pro Gly Ile Ala Pro Gln Asn Lys Me - #t Arg Asn Ser Arg Lys            #       400                                                                    - GGC TCC ATC TAC ATC GTG AAG CCT AAG CAG CA - #C GGC CCT GAA GAA GTC          1842                                                                           Gly Ser Ile Tyr Ile Val Lys Pro Lys Gln Hi - #s Gly Pro Glu Glu Val            #   415                                                                        - GCG TTC ACC AAC GAG CTC TTC GGC CGC GTT GA - #G GAT CTG CTT GAT CTG          1890                                                                           Ala Phe Thr Asn Glu Leu Phe Gly Arg Val Gl - #u Asp Leu Leu Asp Leu            420                 4 - #25                 4 - #30                 4 -        #35                                                                            - CCA CGC CAC ACC TTG AAG GTT GGT GTT ATG GA - #T GAG GAG CGT CGC ACG          1938                                                                           Pro Arg His Thr Leu Lys Val Gly Val Met As - #p Glu Glu Arg Arg Thr            #               450                                                            - TCC GTG AAC CTG GAT GCC AGC ATC ATG GAA GT - #T GCT GAC CGC TTG GCA          1986                                                                           Ser Val Asn Leu Asp Ala Ser Ile Met Glu Va - #l Ala Asp Arg Leu Ala            #           465                                                                - TTC ATC AAC ACT GGC TTC CTG GAC CGC ACC GG - #C GAT GAA ATC CAC ACC          2034                                                                           Phe Ile Asn Thr Gly Phe Leu Asp Arg Thr Gl - #y Asp Glu Ile His Thr            #       480                                                                    - TCC ATG GAA GCA GGC GCC ATG GTG CGC AAG GC - #T GAT ATG CAG ACC GCA          2082                                                                           Ser Met Glu Ala Gly Ala Met Val Arg Lys Al - #a Asp Met Gln Thr Ala            #   495                                                                        - CCG TGG AAG CAG GCC TAC GAG AAC AAC AAC GT - #T GAT GCA GGT ATT CAG          2130                                                                           Pro Trp Lys Gln Ala Tyr Glu Asn Asn Asn Va - #l Asp Ala Gly Ile Gln            500                 5 - #05                 5 - #10                 5 -        #15                                                                            - CGT GGT CTT CCT GGC AAG GCT CAG ATC GGT AA - #G GGC ATG TGG GCG ATG          2178                                                                           Arg Gly Leu Pro Gly Lys Ala Gln Ile Gly Ly - #s Gly Met Trp Ala Met            #               530                                                            - ACT GAA CTC ATG GCA GAA ATG CTG GAG AAG AA - #G ATC GGC CAG CCA CGC          2226                                                                           Thr Glu Leu Met Ala Glu Met Leu Glu Lys Ly - #s Ile Gly Gln Pro Arg            #           545                                                                - GAA GGC GCC AAC ACT GCA TGG GTT CCT TCA CC - #A ACT GGT GCG ACG CTG          2274                                                                           Glu Gly Ala Asn Thr Ala Trp Val Pro Ser Pr - #o Thr Gly Ala Thr Leu            #       560                                                                    - CAC GCA ACG CAC TAC CAC TTG GTT GAT GTG TT - #C AAG GTT CAA GAC GAA          2322                                                                           His Ala Thr His Tyr His Leu Val Asp Val Ph - #e Lys Val Gln Asp Glu            #   575                                                                        - CTG CGT GCT GCC GGC CGC CGC GAC AGC CTG CG - #C AAC ATT CTC ACC ATT          2370                                                                           Leu Arg Ala Ala Gly Arg Arg Asp Ser Leu Ar - #g Asn Ile Leu Thr Ile            580                 5 - #85                 5 - #90                 5 -        #95                                                                            - CCA ACC GCA CCA AAC ACC AAT TGG TCT GAG GA - #A GAG AAG AAG GAA GAG          2418                                                                           Pro Thr Ala Pro Asn Thr Asn Trp Ser Glu Gl - #u Glu Lys Lys Glu Glu            #               610                                                            - ATG GAC AAC AAC TGC CAG TCC ATC CTC GGA TA - #C GTT GTG CGC TGG GTT          2466                                                                           Met Asp Asn Asn Cys Gln Ser Ile Leu Gly Ty - #r Val Val Arg Trp Val            #           625                                                                - GAG CAC GGT GTT GGT TGC TCC AAG GTT CCA GA - #C ATC CAT GAC ATC GAC          2514                                                                           Glu His Gly Val Gly Cys Ser Lys Val Pro As - #p Ile His Asp Ile Asp            #       640                                                                    - CTC ATG GAA GAC CGC GCA ACG CTG CGT ATT TC - #C TCG CAG ATG CTG GCC          2562                                                                           Leu Met Glu Asp Arg Ala Thr Leu Arg Ile Se - #r Ser Gln Met Leu Ala            #   655                                                                        - AAC TGG ATC CGC CAT GAT GTT GTC TCG AAG GA - #G CAG GTC TTG GAG TCA          2610                                                                           Asn Trp Ile Arg His Asp Val Val Ser Lys Gl - #u Gln Val Leu Glu Ser            660                 6 - #65                 6 - #70                 6 -        #75                                                                            - CTG GAA CGA ATG GCA GTG GTC GTC GAC AAG CA - #A AAT GCG GGC GAC GAG          2658                                                                           Leu Glu Arg Met Ala Val Val Val Asp Lys Gl - #n Asn Ala Gly Asp Glu            #               690                                                            - GCC TAC CGC GAT ATG GCG CCG AAC TAC GAC GC - #C TCC CTC GCC TTC CAG          2706                                                                           Ala Tyr Arg Asp Met Ala Pro Asn Tyr Asp Al - #a Ser Leu Ala Phe Gln            #           705                                                                - GCG GCT AAG GAC TTG ATT TTC GAA GGC ACC AA - #G TCC CCA TCG GGC TAC          2754                                                                           Ala Ala Lys Asp Leu Ile Phe Glu Gly Thr Ly - #s Ser Pro Ser Gly Tyr            #       720                                                                    - ACC GAG CCC ATC TTG CAC GCA CGC CGC CGC GA - #G TTC AAA GCA AAA AAC          2802                                                                           Thr Glu Pro Ile Leu His Ala Arg Arg Arg Gl - #u Phe Lys Ala Lys Asn            #   735                                                                        - TAA GCACGCTTTT CGACGCTTAC CTGCATCCCA ACGGTGACTG ACTGCCCCG - #G               2855                                                                            *                                                                             740                                                                            - AGCCACCCTC ACTCCTTTTT GGTCAGCACC CAAAAGCGCC GGTTCAACAC AC - #ACAAAGTC        2915                                                                           - GCGCCATTCA CCTTCGCCAA TATCGGCCAC GGTGGAGGCG CGACTTTCGC CT - #GGATTCCA        2975                                                                           #             3024ATGAC CATCGCCCTC AATGGTGATG ATGCGATCG                        - (2) INFORMATION FOR SEQ ID NO:2:                                             -      (i) SEQUENCE CHARACTERISTICS:                                                     (A) LENGTH:  739 ami - #no acids                                               (B) TYPE: amino acid                                                           (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: protein                                              -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:2:                                  - Met Thr Glu Gln Glu Leu Leu Ser Ala Gln Th - #r Ala Asp Asn Ala Gly          #                 15                                                           - Thr Asp Ser Thr Glu Arg Val Asp Ala Gly Gl - #y Met Gln Val Ala Lys          #             30                                                               - Val Leu Tyr Asp Phe Val Thr Glu Ala Val Le - #u Pro Arg Val Gly Val          #         45                                                                   - Asp Ala Glu Lys Phe Trp Ser Gly Phe Ala Al - #a Ile Ala Arg Asp Leu          #     60                                                                       - Thr Pro Arg Asn Arg Glu Leu Leu Ala Arg Ar - #g Asp Glu Leu Gln Met          # 80                                                                           - Leu Ile Asp Asp Tyr His Arg Asn Asn Ser Gl - #y Thr Ile Asp Gln Glu          #                 95                                                           - Ala Tyr Glu Asp Phe Leu Lys Glu Ile Gly Ty - #r Leu Val Glu Glu Pro          #           110                                                                - Glu Ala Ala Glu Ile Arg Thr Gln Asn Val As - #p Thr Glu Ile Ser Ser          #       125                                                                    - Thr Ala Gly Pro Gln Leu Val Val Pro Ile Le - #u Asn Ala Arg Phe Ala          #   140                                                                        - Leu Asn Ala Ala Asn Ala Arg Trp Gly Ser Le - #u Tyr Asp Ala Leu Tyr          145                 1 - #50                 1 - #55                 1 -        #60                                                                            - Gly Thr Asn Ala Ile Pro Glu Thr Asp Gly Al - #a Glu Lys Gly Lys Glu          #               175                                                            - Tyr Asn Pro Val Arg Gly Gln Lys Val Ile Gl - #u Trp Gly Arg Glu Phe          #           190                                                                - Leu Asp Ser Val Val Pro Leu Asp Gly Ala Se - #r His Ala Asp Val Glu          #       205                                                                    - Lys Tyr Asn Ile Thr Asp Gly Lys Leu Ala Al - #a His Ile Gly Asp Ser          #   220                                                                        - Val Tyr Arg Leu Lys Asn Arg Glu Ser Tyr Ar - #g Gly Phe Thr Gly Asn          225                 2 - #30                 2 - #35                 2 -        #40                                                                            - Phe Leu Asp Pro Glu Ala Ile Leu Leu Glu Th - #r Asn Gly Leu His Ile          #               255                                                            - Glu Leu Gln Ile Asp Pro Val His Pro Ile Gl - #y Lys Ala Asp Lys Thr          #           270                                                                - Gly Leu Lys Asp Ile Val Leu Glu Ser Ala Il - #e Thr Thr Ile Met Asp          #       285                                                                    - Phe Glu Asp Ser Val Ala Ala Val Asp Ala Gl - #u Asp Lys Thr Leu Gly          #   300                                                                        - Tyr Ser Asn Trp Phe Gly Leu Asn Thr Gly Gl - #u Leu Lys Glu Glu Met          305                 3 - #10                 3 - #15                 3 -        #20                                                                            - Ser Lys Asn Gly Arg Ile Phe Thr Arg Glu Le - #u Asn Lys Asp Arg Val          #               335                                                            - Tyr Ile Gly Arg Asn Gly Thr Glu Leu Val Le - #u His Gly Arg Ser Leu          #           350                                                                - Leu Phe Val Arg Asn Val Gly His Leu Met Gl - #n Asn Pro Ser Ile Leu          #       365                                                                    - Ile Asp Gly Glu Glu Ile Phe Glu Gly Ile Me - #t Asp Ala Val Leu Thr          #   380                                                                        - Thr Val Cys Ala Ile Pro Gly Ile Ala Pro Gl - #n Asn Lys Met Arg Asn          385                 3 - #90                 3 - #95                 4 -        #00                                                                            - Ser Arg Lys Gly Ser Ile Tyr Ile Val Lys Pr - #o Lys Gln His Gly Pro          #               415                                                            - Glu Glu Val Ala Phe Thr Asn Glu Leu Phe Gl - #y Arg Val Glu Asp Leu          #           430                                                                - Leu Asp Leu Pro Arg His Thr Leu Lys Val Gl - #y Val Met Asp Glu Glu          #       445                                                                    - Arg Arg Thr Ser Val Asn Leu Asp Ala Ser Il - #e Met Glu Val Ala Asp          #   460                                                                        - Arg Leu Ala Phe Ile Asn Thr Gly Phe Leu As - #p Arg Thr Gly Asp Glu          465                 4 - #70                 4 - #75                 4 -        #80                                                                            - Ile His Thr Ser Met Glu Ala Gly Ala Met Va - #l Arg Lys Ala Asp Met          #               495                                                            - Gln Thr Ala Pro Trp Lys Gln Ala Tyr Glu As - #n Asn Asn Val Asp Ala          #           510                                                                - Gly Ile Gln Arg Gly Leu Pro Gly Lys Ala Gl - #n Ile Gly Lys Gly Met          #       525                                                                    - Trp Ala Met Thr Glu Leu Met Ala Glu Met Le - #u Glu Lys Lys Ile Gly          #   540                                                                        - Gln Pro Arg Glu Gly Ala Asn Thr Ala Trp Va - #l Pro Ser Pro Thr Gly          545                 5 - #50                 5 - #55                 5 -        #60                                                                            - Ala Thr Leu His Ala Thr His Tyr His Leu Va - #l Asp Val Phe Lys Val          #               575                                                            - Gln Asp Glu Leu Arg Ala Ala Gly Arg Arg As - #p Ser Leu Arg Asn Ile          #           590                                                                - Leu Thr Ile Pro Thr Ala Pro Asn Thr Asn Tr - #p Ser Glu Glu Glu Lys          #       605                                                                    - Lys Glu Glu Met Asp Asn Asn Cys Gln Ser Il - #e Leu Gly Tyr Val Val          #   620                                                                        - Arg Trp Val Glu His Gly Val Gly Cys Ser Ly - #s Val Pro Asp Ile His          625                 6 - #30                 6 - #35                 6 -        #40                                                                            - Asp Ile Asp Leu Met Glu Asp Arg Ala Thr Le - #u Arg Ile Ser Ser Gln          #               655                                                            - Met Leu Ala Asn Trp Ile Arg His Asp Val Va - #l Ser Lys Glu Gln Val          #           670                                                                - Leu Glu Ser Leu Glu Arg Met Ala Val Val Va - #l Asp Lys Gln Asn Ala          #       685                                                                    - Gly Asp Glu Ala Tyr Arg Asp Met Ala Pro As - #n Tyr Asp Ala Ser Leu          #   700                                                                        - Ala Phe Gln Ala Ala Lys Asp Leu Ile Phe Gl - #u Gly Thr Lys Ser Pro          705                 7 - #10                 7 - #15                 7 -        #20                                                                            - Ser Gly Tyr Thr Glu Pro Ile Leu His Ala Ar - #g Arg Arg Glu Phe Lys          #               735                                                            - Ala Lys Asn                                                                              740                                                                - (2) INFORMATION FOR SEQ ID NO:3:                                             -      (i) SEQUENCE CHARACTERISTICS:                                           #pairs    (A) LENGTH: 574 base                                                           (B) TYPE: nucleic acid                                                         (C) STRANDEDNESS: single                                                       (D) TOPOLOGY: linear                                                 -     (ii) MOLECULE TYPE: DNA (genomic)                                        -    (iii) HYPOTHETICAL: NO                                                    -     (iv) ANTI-SENSE: NO                                                      -     (vi) ORIGINAL SOURCE:                                                              (A) ORGANISM: Corynebacter - #ium glutamicum                                   (B) STRAIN: ATCC 13032                                               -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:3:                                  - CTTAAGTGCT GATTCGCAAT GGGCGGTGCC GACCACAAAG TATGAGCTAA TG - #CACTGTCA          60                                                                           - CTGTTTCGAC GTGATGTGCA TCGGTTTGCG TGGTGGCGTG GTTCACACAT TG - #CTCCATCG         120                                                                           - GGCATTGGTG CGTCAATCGG TTTGGGTTTT TAAGTTTTGT GCGGGGGTGG TC - #ACCCCTGT         180                                                                           - TGTGAAGTTT GCAAAGTTCT GGCTTCGCAG AAAAAGTGGG CGGGGGAGTT GC - #TAGTACGG         240                                                                           - ATGTACTGGG CAAATGCTCT GAAATGGGAA AATGCAGGCA CCGCAACGTT CC - #GTAGGTTT         300                                                                           - CGAAGGTGTG ACCTAGATAA AAGTCGGGGT TAGGCGGGGG TAATGACTTA GT - #AAAGTTCG         360                                                                           - CAAACCCCTT TTGCTGGTGA CGGTGATCAC TTAGTCTGAT CACATCGCCA AA - #CACGATAA         420                                                                           - GGGTTGAAAT CGAAAGAAGA GTGGCACCTA GATTCCAGAG GTAGTCAGAG TG - #CTTTTCTT         480                                                                           - AAAAGAGTTT TCACAACCGT TAACGCGTAG CCAAACAAGA AGGATTCGCA TT - #CTTCTGGT         540                                                                           #       574        TAAA ACCCATGCTT TAAA                                        __________________________________________________________________________ 

We claim:
 1. An isolated recombinant polynucleotide comprising the nucleic acid sequence as given in SEQ ID NO:
 3. 2. The isolated recombinant polynucleotide defined in claim 1 further comprising a structural gene located downstream of said isolated polynucleotide.
 3. A vector containing an isolated polynucleotide comprising the nucleic acid sequence as given in SEQ ID NO:
 3. 4. The vector containing an isolated polynucleotide defined in claim 3 further comprising a structural gene located downstream of said isolated polynucleotide.
 5. A transformed Coryneform cell containing the vector defined in claim
 3. 6. A transformed microorganism containing in replicatable form the isolated polynucleotide comprising the nucleic acid sequence as given in SEQ ID NO:
 3. 7. The transformed microorganism defined in claim 6 wherein the recombinant microorganism is a transformed Coryneform cell.
 8. A method for synthesizing a protein by expressing a structural gene coding for said protein, which comprises the following steps:(a) transforming a microorganism with a vector containing an isolated polynucleotide comprising the nucleic acid sequence as given in SEQ ID NO: 3 and downstream thereof a structural gene coding for said protein; (b) culturing said microorganism in a medium to which an inductor has been added to express said structural gene; and (c) recovering the protein expressed by the structural gene.
 9. The method defined in claim 8 wherein according to step (b) the inductor is lactate, pyruvate or acetate.
 10. The method defined in claim 8 wherein according to step (a) the microorganism is a coryneform bacterium. 